Auto Set - Fluke Autoranging CombiScope PM3370B Reference Manual

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4.3.3

Auto set

This test checks the correct working of the AUTOSET function.
Test equipment:
Fluke 5500A mode levsine (Alternative: Constant amplitude sine wave generator
SG 503).
Test set-up:
Settings/procedure:
1 - Apply a 10 MHz sine wave signal of 600 mV (pp into 50Ω) to input CH1;.
2 - Press the green AUTOSET key. Use a 50Ω termination at the end of the
coax cable. For instruments with switchable 50Ω input impedance
(attainable via VERT MENU key) it is recommended to use the internal
termination (when active, the text 'LZ' appears in the lower part of the
viewing area). For instruments without internal termination, an external
termination should be used.
Requirements:
1 - Verify that the displayed waveform is stable and properly triggered.
Amplitude should be within the screen area. Horizontally some signal
periods should be displayed.
2 - Repeat the same settings and procedure for CH2, CH3 and CH4. For
PM3370B/80B/90B: check CH2 and input EXT TRIG.
3 - Press the ANALOG key to return to digital mode. The message 'DIGITAL
MODE' appears briefly.
4 - Repeat the AUTOSET check in the digital mode for CH2, CH3, and CH4.
For PM3370B/80B/90B: check CH2 and input EXT TRIG.
PERFORMANCE TEST